UV light blocking and conversion by porous europium-doped titanium dioxide (TiO2-Eu) thin films for potential protection of photovoltaic devices

K. Zhumanova, L. Serik, A. Molkenova, T. S. Atabaev

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In recent years, transparent thin films capable of screening and converting ultraviolet (UV) photons into visible spectrum gained significant interest in the protection of photovoltaic devices. We investigated the optical properties and UV screening capability of europium-doped titanium oxide (TiO2−Eu) thin films deposited by the spin-coating method from a solution precursor for the first time in this study. We showed that TiO2-Eu thin films demonstrate europium concentration-dependent optical properties, and the quantum yield of the optimized sample was found to be ∼10.2%. Transmittance and photoluminescence measurements suggested that TiO2−Eu thin film can effectively block UV photons (∼30.5% at 320 nm) at glass substrate and convert them to the red emission thanks to 5D07Fj (j = 0, 1, 2, 3, and 4) Eu (III) electronic transitions. Photodegradation experiments with methylene blue dye revealed that TiO2−Eu thin films offer better UV protection compared to uncoated samples. We strongly believe that porous TiO2−Eu thin films can be effectively utilized as a UV blocking and light conversion coating.

Original languageEnglish
Article number101171
JournalMaterials Today Chemistry
Volume26
DOIs
Publication statusPublished - Dec 2022

Keywords

  • Coatings
  • Downconversion
  • Europium-doped TiO
  • Spectral converter
  • UV protection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Colloid and Surface Chemistry
  • Catalysis

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